[Bug tree-optimization/20742] [4.0/4.1 Regression] Hang in tree_ssa_iv_optimize_loop

[pinskia at gcc dot gnu dot org]

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           What    |Removed                     |Added
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           Severity|critical                    |normal
           Keywords|                            |compile-time-hog
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20742